/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors 
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.analytics.dimension;

import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import lombok.RequiredArgsConstructor;
import org.hisp.dhis.analytics.DataQueryParams;
import org.hisp.dhis.analytics.DataQueryService;
import org.hisp.dhis.analytics.event.data.programindicator.disag.PiDisagRecommendedDimensions;
import org.hisp.dhis.category.Category;
import org.hisp.dhis.common.DataQueryRequest;
import org.hisp.dhis.common.DimensionalObject;
import org.hisp.dhis.common.IdentifiableObjectManager;
import org.hisp.dhis.dataelement.DataElement;
import org.hisp.dhis.organisationunit.OrganisationUnitGroupSet;
import org.hisp.dhis.security.acl.AclService;
import org.hisp.dhis.user.CurrentUserUtil;
import org.hisp.dhis.user.UserDetails;
import org.springframework.stereotype.Service;

/**
 * @author Lars Helge Overland
 */
@Service("org.hisp.dhis.analytics.dimension.AnalyticsDimensionService")
@RequiredArgsConstructor
public class DefaultAnalyticsDimensionService implements AnalyticsDimensionService {
  private final DataQueryService dataQueryService;

  private final AclService aclService;

  private final IdentifiableObjectManager idObjectManager;

  @Override
  public List<DimensionalObject> getRecommendedDimensions(DataQueryRequest request) {
    DataQueryParams params = dataQueryService.getFromRequest(request);
    return getRecommendedDimensions(params);
  }

  @Override
  public List<DimensionalObject> getRecommendedDimensions(DataQueryParams params) {
    Set<DimensionalObject> dimensions = new HashSet<>();

    if (!params.getDataElements().isEmpty()) {
      dimensions.addAll(
          params.getDataElements().stream()
              .map(de -> ((DataElement) de).getCategoryCombos())
              .flatMap(cc -> cc.stream())
              .map(cc -> cc.getCategories())
              .flatMap(c -> c.stream())
              .filter(Category::isDataDimension)
              .collect(Collectors.toSet()));

      dimensions.addAll(
          params.getDataElements().stream()
              .map(de -> ((DataElement) de).getDataSets())
              .flatMap(ds -> ds.stream())
              .map(ds -> ds.getCategoryCombo().getCategories())
              .flatMap(c -> c.stream())
              .filter(Category::isDataDimension)
              .collect(Collectors.toSet()));
    }

    if (!params.getProgramIndicators().isEmpty()) {
      dimensions.addAll(PiDisagRecommendedDimensions.getRecommendations(params, idObjectManager));
    }

    dimensions.addAll(idObjectManager.getDataDimensions(OrganisationUnitGroupSet.class));

    // TODO Filter org unit group sets

    UserDetails currentUserDetails = CurrentUserUtil.getCurrentUserDetails();
    return dimensions.stream()
        .filter(d -> aclService.canDataOrMetadataRead(currentUserDetails, d))
        .sorted()
        .collect(Collectors.toList());
  }
}
